Abstract
The article analyzes in detail the influence of curing modes on the physical and mechanical properties of polymer compositions. The research methodology is presented. The object of the study was: a composition based on phenol-formaldehyde resin modified with antifriction fillers (patent for a useful model No. 136085. "polymer antifriction composition"). The research was based on the study of the physical, mechanical, technological properties of polymer coatings obtained by the method of direct compression cutting. The study of adhesion strength was carried out by the method of normal pull-off of two cylindrical specimens connected butt and tapered pins. To study the adhesion strength, a special tooling was made. The influence of technological parameters of pressing on the adhesive strength of polymer coatings has been studied. The experimental study was carried out in accordance with the Box-Benkin planning matrix. The optimization parameters were: adhesion strength of the coating to the base, hardness, ultimate strength in compression, density. Thus, with different pressing parameters, the adhesion strength changes from 4 to 18.4 MPa, the HB hardness from 74 to 188 MPa, the ultimate compressive strength from 46.1 to 131.2 MPa, and the density from 1544 to 1694 kg/m3 . Pressing modes: holding time under pressure 0.8 min/mm, pressure 54-75 MPa, mold temperature 438- 463 K.
Publisher
National University of Life and Environmental Sciences of Ukraine
Subject
General Arts and Humanities